| Definitions | atomic mass,etc... | Quiz #1 | Quiz #2 | Quiz #3 |
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What is an atom?
It is the smallest unit of matter that makes up al chemical elements.
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What is the atomic number?
The atomic mass is how many atoms in an element, determining what element it is.
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What is the name of the simple diagram we use, and who is it named after.
The Bohr model, which is named after Niels Bohr.
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The atom was discovered by______and atom means_______.
The atom was discovered by Democritus and atom means uncuttable.
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Neutrons are usually represented as____, protons are usually represented as______, and electrons are usually represented as_______.
grey, red, blue.
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What is a proton?
A proton is one of the three subatomic particles in an atom, with a positive charge.
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What is the mass number?
The mass number is the number of protons plus neutrons, because electrons don't really weigh much.
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Where is the proton located?
The nucleus, which is in the middle of the atom.
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If you subtract or add a proton, it changes the _______.
Chemical formula.
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There are ___ elements on the periodic table.
118
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What is a neutron?
It is one of the three subatomic particles in an atom, with a neutral, or no charge.
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What is the atomic mass?
The atomic mass is the average mass of all the naturally occurring atoms of that element.
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Where is the neutron located?
In the nucleus, which is in the center of the atom, with the protons.
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If you subtract or add a neutron, it changes the _______.
Mass.
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What is the 1 element?
Hydrogen (H)
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What is an electron?
It is one of the three subatomic particles in an atom, with a negative charge.
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The mass number of an atom is 7, and the atomic number is 3. How many protons, neutrons, and electrons?
There are 3 protons, 4 neutrons, and 3 electrons. The atomic number is the number of protons, and the mass number is that plus the amount of neutrons, so you subtract the atomic number. No further information was provided on the electrons, so you assume it is the same as protons, with a neutral charge.
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Where is the electron located?
In the orbits, alone, orbiting around the nucleus.
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If you subtract or add an electron, it changes the _______.
Net charge.
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What is the 5 element?
Boron (B)
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What is an ion, and what are the sub-categories called?
An ion is an atom with a positive or negative charge, which means there are more or less electrons than protons. Positive is called a cation, and negative is an anion.
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The atomic number of an atom is 6, and there are 7 neutrons. What is the mass number?
The mass number is 13. 6+7=13.
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What is special about valence electrons?
They are the electrons on the outer shell of the atoms, and they determine where the element is on the periodic table.
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The atom is ____times thinner than a human hair.
500,000
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What is the 10 element?
Neon (Ne)
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